A list titled overcrowded city streets. There are two numbered lists below. 1, Cars are becoming too numerous on city streets. 2, The air is becoming polluted. 3, The noise level is rising. 1, More money from the city government should go to public transportation. 2, A subway system should be built. 3, People should be encouraged to carpool to work and school. According to the outline, which statements represent possible problems? Check all that apply.

The city streets are overcrowded with cars.
A subway system should be built.
Money should be put toward public transportation.
There is a lot of noise pollution.
People should carpool to school and work.